–2х + 19 = 5х – 16 (х; 1)
2. 8х – 25 = 3х + 20 (х; 0)
3. 6 – у = 3(3у – 8) (5; у)
4. 5(у + 1,2) = 7у + 4 (1; у)
5. 4(х – 3) – 16 = 5(х – 5) (х; 3)
6. 3х – 17 = 8х + 18 (х; 0)
7. 11 – 5у = 12 – 6у (–3; у)
8. 4у + (11,8 – у) = 3,8 – 5у (1; у)
9. 3х + 16 = 8х – 9 (х; 1)

1. -2х + 19 = 5х - 16 

-2х-5х=-16-19

-7х=-35

х=5

2. 8х - 25 = 3х + 20 

8х-3х=20+25

5х=45

х=9

3. 6 - у = 3(у - 8) 

6-у=3у-24

-у-3у=-24-6

-4у=-30

у=7,5

4. 5(у + 1,2) = 7у + 4

5у+6=7у+4

5у-7у=4-6

-2у=-2

у=1

5. 4(у - 3) - 16 = 5

4у-12-16=5

4у=5+16+12

4у=33

у=8,25

6. 3у - 17 = 8у + 18 

3у-8у=18+17

-5у=35

у=-7

7. 11 - 5у = 12 - 6у

-5у+6у=12-11

у=1

8. 4у + (11,8 - у) = 3,8 - 5у

 4у+ 11,8-у= 3,8-5у

4у-у+5у=3,8-11,8

4у=-8

у=-1

9. 3x + 16 = 8x - 9

3x-8x=-9-16

-5x=-25

x=5

Пошаговое объяснение:

Пошаговое объяснение:

–2х + 19 = 5х – 16   (5 ; 1)

5x + 2x = 19 + 16

7x = 35

x = 35 : 7

x = 5

2. 8х – 25 = 3х + 20   (9; 0)

8x - 3x = 20 + 25

5x = 45

x = 45 : 5

x = 9

3. 6 – у = 3(3у – 8)   (5; 3)

6 - y = 9y - 24

9y + y = 6 + 24

10y = 30

y = 30 : 10

y = 3

4. 5(у + 1,2) = 7у + 4   (1; 1)

5y + 6 = 7y + 4

7y - 5y = 6 - 4

2y = 2

y = 1

5. 4(х – 3) – 16 = 5(х – 5)   (-3 ; 3)

4x - 12 - 16 = 5x - 25

4x - 28 = 5x - 25

5x - 4x = -28 + 25

x = -3

6. 3х – 17 = 8х + 18   (-7; 0)

3x - 17 = 8x + 18

8x - 3x = -17 - 18

5x = -35

x = -35 : 5

x = -7

7. 11 – 5у = 12 – 6у    (–3; 1)

11 - 5y = 12 - 6y

6y - 5y = 12 - 11

y = 1

8. 4у + (11,8 – у) = 3,8 – 5у    (1; -1)

4y + 11,8 - y = 3,8 - 5y

3y + 11,8 = 3,8 - 5y

3y + 5y = 3,8 - 11,8

8y = -8

y = -1

9. 3х + 16 = 8х – 9    (5; 1)

3x + 16 = 8x - 9

8x - 3x = 16 + 9

5x = 25

x = 25 : 5

x = 5